Combination lock



H. H. SMITH.

COMBINATION LOCK.

APPLICATION mm MAR. 3. 1922.

1,430,332. Pa t p 26,1922.

Patented 26,

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retain E'URLEY E. SMITH, OF ELKHART, INDIANA.

COMBINATION LOCK.

Application filed March 3,

T 0 all to lwm it may concern Be it known that Lflnnnnr H. SMITH, acitizen of the United States,'and resident of Elkhart, in the county ofElkhart and State of Indiana, have invented certain new and usefulImprovements in Combination Locks, of which the following is a full,clear, and exact description.

My invention relates to combination locks of the push button type and isintended as an improvement on the structure shown in Patent 596,185, toadapt the same to a door lock and improve said device in many features.

An object of my invention is to provide a combination lock ofthe typespecified that p shall be capable of a large number of combinationswhich can be changed when desired, and shall be simple in constructionand efficient in its operation.

Another object is to provide a lock that can be readily set, and whichit will be practically impossible for any one to unlock without a"knowledge of the combination.

Other objects will be apparent from the following detailed descriptionand the appended claims.

Figure 1 is a side elevation of the device in position in a door, with aportion of the door in section.

Figure 2 is a view of the device as it appears from the outside of thedoor.

"Figure 3 is a section on the line 3-3 of Figure 1.

Figure 4 is a section on the line 44 of Figure 1. j 1

Figure 5 is an'end view of the spindle of the outer knob and associatedparts.

Figure 6 is a View partly in section sh0W- ing the end of the spindle ofthe inner knob and the connections therefrom to the looking bolt of thedoor.

An inner knob 1 is carried by the frame A of the door and the outer knob2 is mounted in a plate 3 of suitable material to which is preferablyattached on the inside another plate 4. Keys 5 are mounted on the endsof stems 6 which slide in the plates 3 andt as shown. In a cut outportion of the door and inside of the plate 3 is located a frame 7 whichhas longitudinalplates 8,9, 10 and 1.1, and cross plates 12, 13, 14 and15, the cross plates 12 and 13 being preferably integral with thelongitudinal plate 8, though not necessarily so. Sliding plates or bolts16, corresponding in number to the keys 5 and 1922. Serial No. 540,704.

stems 6 are mounted to slide through the longitudinal plates 9, 10, and11 in bearings therein. Each plate has on opposite sides cut outportions 17, clearly represented in Figures 3 and 4. The cutoutportions, on opposite sides do not register.

A longitudinal bolt 18, generally rectair gular in cross'section, liesbetween the plates 9 and 10 and is guided inopenings in the plates 12and 13. This bolt has portions cut out of two sides toform shoulders asshown in the'drawings, each pair of shoulders be ing adjacent he plates.or bolts 16 and lying just above the same when'the bolt 18 is inlooking position. v

The out out portions 17' are of a width just sufficient" to clear thelocking bolt 18 when the plates 16 are set'in inoperative position.Thelower plate 16 in Figure 1 is shown as in locking position, and it isevident that a portion of this plate lies under one shoulder of the bolt18. If this plate 16 ismoved inward byits key 5, as shown in Figure 3,the cut out 17 will be brought to register with the belt which can bethen movedwithout any interference with this stem.

Near the lower end the locking bolt 18 has a pin 19 and between the pin19 and the plate 15 is a spring 20 which tends to throw the locking bolt18 downward until the pin contacts with the plate 12, when the bolt isin unlocked position.

In the lower part of the casing 3'is mounted a stem 21 provided with ahandle 22 on its outer end, and a flat extension 23 on its side near itsinner end which underlies the lower end of the bolt 18. By turning thehandle 22' the extension 23 can be moved from the lower dotted lineposition of Figure 2 to the upper dot and dash position which movementresults in moving the bolt 18 upward to locking position and compressingthe spring 20.

Near the upper end of the casing 3, on the inside thereof is a frame 2 1through which the spindle 25 of the knob 2 canslide. Vithin this frameis a spring 26 surrounding the spindle 25 and normally holding it andthe knob 2 in outer position. The inner end of the' spindle 25 has a:rectangular is in turn pivoted at 32 to the door bolt 33. This ismounted to slide in a casing 34: and a spring 35 normally tends to holdit closed.

Each of the sliding plates or bolts 16 has a pin 36 therein and a spring3'? surrounds said plate between the pin 38 and the plate 10, saidspring thus tending to hold the sliding plate in outer position, thesepins and springs have been omitted from Figures 5 and i for the sake ofclearness.

The number. of the sliding plates 16 may beas desired. Each is numberedon the out side, as shown in Figure 2.

The operation of the device is believed to be clear-from theabovedescription, but may be briefly setforth as follows.

l'Vhenever the bolt 18 is in its lower or unlocked position, the doorcan be opened from the outside bypressing in on the knob 2 until thegroove 27 engages the member 29 and then turning the knob to withdrawthe door bolt 3 When it is desired to use the-combination.

lock, certain of the plates 16 are set in the position of the lowerplate in Figure 3 so that. a. portion thereof will underlie the shoulderon the bolt. 18 whenit is pushed upv The handle 22 isturned, movingupthe bolt 18 by means of the extension 23, and the sliding plates 16 thatare set will be cammed aside until the shoulders on the bolt 18 passabove the same. The plates that have been thus set willthen prevent thereturn of the bolt 18. When the bolt 18 is in its upper position itfills the space between the end of thespindle 25 and the member 29. Theouter knob 2 cannot then be pushed in, and the door cannot be openedfrom the outside, although the inside knob will move the door bo.'.t-33as usual.

To unlock, it is simply necessary to press the buttons 5. of thosesliding plates or bolts that have been set in looking position. Thiswill remove those plates from beneath the shoulders onthe bolt 18 andthe spring 20 will move it downward to a position whereitwillnotinterfere with the. inward movement of the spindle 25 of theouter knob.

It is to be noted that the proper buttons 5 must all be pressedsimultaneously, and that no other buttons can be pressed without lookingthe bolt 18, This results from the fact that the sliding plates or bolts16 which are normally free of the. shoulders on the bolt 18 will comeinto the 132L'i7l1' 0f said shoulders if pressed. For example, if theupper button in Figure 4 is pressed the plate 16 corresponding theretowill come into the path of the adjacent shoulder on the bolt 18.

change the combination, the inside plate is removed, and anydesiredplate 16 can. be emoved and turned over. This will bring the cut outportion 17 on the opposite ferent combinations may be used as desiredThe number of sliding plates or bolts 16 may be varied and details ofform. and

arrangement may be changed as desired; The device is not limited to adoor for its utility, but will be generally usedin a closure of similartype.

I claim as my invention.

1. Acombination lock comprising a frame, a locking bolt mounted to slidelongitudinally in said frame and provided with shoulders at pointsintermediate its length, plates mounted to slide transversely in. saidframe and having cut-out portions adjacent said shoulders, certainof'said cut-0ut portions registering with the locking bolt and othersbeing out of register and havingua portion of the plate underlying theshoulder to prevent movement of the bolt to unlocked position, a springfor normally holding the bolt in inoperative position, springs holding,

the plates in normal position, and'finger keys for moving the operativeplatesto inoperative position;

2. A combination lock comprising a' frame, a locking bolt mounted toslidelongi tudinally in said frame and providedwith shoulders at pointsintermediate its length, sliding plates arranged in pairs, one on eachside of the bolt and having cut-out portions adjacent the shoulders,certainof said cut-out portions registering, with-the lockin bolt andothers being out ofregister where y a portion of the plateunderli'es ashoulder and prevents movement of the bolt to unlocked position, springmeans for holding said bolt in unlocked position, means for moving it tolocking, position in which it is held by certain of saidplates, andmeans for sliding the holding plates transversely to release the lockingbolt.

3. Locking mechanism for doors comprising an inner knob, meansconnectedto the spindle thereof to operate the door bolt, an outer knobnormally disconnected from said meansbut movable inwardly intoengagement therewith, alocking bolt slidable into position to preventsaidengagement, means for retaining, the locking bolt in operativeposition, said means operative by certain predetermined keys to releasethe locking bolt.

4;. Locking mechanism for doorscompr'ising an inner knob, meansconnected'thereto' to operate a door bolt, an outer knob normally springpressed out of engagement with said means but movable inwardly intoengagement therewith, a locking bolt slidable into position to preventsaid engagement, sliding plates having means for retaining said bolt inlooking position, and means for operating said plates to release thelocking bolt.

5. Locking mechanism for doors comprising an inner knob, means connectedthereto to operate a door bolt, an outer knob normally spring pressedout of engagement with said means but movable into engage menttherewith, a locking bolt slidable into position to prevent saidengagement, should ers on said bolt, sliding plates having portions thatmay be set to engage said shoulders and hold the bolt in lookingposition, means for operatin said plates to release the bolt, and meansfor then moving the bolt to inoperative position.

6. A combination lock comprising a frame, a longitudinally sliding bolttherein, pairs of transversely sliding plates, the plates of each pairlying on opposite sides of said bolt, each plate having cut out portionsin both edges, the cut out portion on one edge being in position toregister with the locking bolt, and the cut out portion on the otheredge being in a position wherein it does not register with said bolt,each plate being reversible whereby the combination may be changed.

In testimony whereof, I have hereunto subscribed my name.

HURLEY H. SMITH.

